Структура, доп модули, федерация, документация

backend/src/Modules/Admin/Application/Admin/Commands/UpdateSettings/UpdateSettingsCommand.cs

@@ -5,6 +5,7 @@ using System.Threading.Tasks;
 using MediatR;
 using Knot.Shared.Kernel;
 using Knot.Shared.Kernel.Configuration;
+using System.Security.Cryptography;
 
 namespace Host.Application.Admin.Commands;
 
@@ -13,15 +14,33 @@ public record UpdateSettingsCommand(SystemSettingsDto Settings) : ICommand<Syste
 internal sealed class UpdateSettingsCommandHandler : ICommandHandler<UpdateSettingsCommand, SystemSettingsDto>
 {
     private readonly ISettingsService _settingsService;
+    private readonly IMediator _mediator;
 
-    public UpdateSettingsCommandHandler(ISettingsService settingsService)
+    public UpdateSettingsCommandHandler(ISettingsService settingsService, IMediator mediator)
     {
         _settingsService = settingsService;
+        _mediator = mediator;
     }
 
     public async Task<Result<SystemSettingsDto>> Handle(UpdateSettingsCommand request, CancellationToken cancellationToken)
     {
+        // Если федерация включена, но ключи еще не сгенерированы — создаем их
+        if (request.Settings.Federation.Enabled && 
+            (string.IsNullOrEmpty(request.Settings.Federation.PrivateKey) || 
+             string.IsNullOrEmpty(request.Settings.Federation.PublicKey)))
+        {
+            using var rsa = RSA.Create(2048);
+            
+            // Экспорт в формате PKCS#8 (Private) и PKCS#1 (Public) в Base64 PEM-строки
+            request.Settings.Federation.PrivateKey = Convert.ToBase64String(rsa.ExportPkcs8PrivateKey());
+            request.Settings.Federation.PublicKey = Convert.ToBase64String(rsa.ExportRSAPublicKey());
+        }
+
         await _settingsService.UpdateSettingsAsync(request.Settings, cancellationToken);
+        
+        // Уведомляем другие модули (в т.ч. Федерацию) через Доменное Событие
+        await _mediator.Publish(new Knot.Modules.Admin.Domain.Events.SystemSettingsUpdatedDomainEvent(request.Settings), cancellationToken);
+
         return Result.Success(request.Settings);
     }
 }

backend/src/Modules/Admin/Domain/Events/SystemSettingsUpdatedDomainEvent.cs

@@ -0,0 +1,10 @@
+using System.Collections.Generic;
+using Knot.Shared.Kernel;
+using Knot.Shared.Kernel.Configuration;
+
+namespace Knot.Modules.Admin.Domain.Events;
+
+/// <summary>
+/// Доменное событие: глобальные настройки системы обновлены.
+/// </summary>
+public sealed record SystemSettingsUpdatedDomainEvent(SystemSettingsDto Settings) : IDomainEvent;